service-worker-interception-tests.js

function openWindow(t, url) {
  return new Promise(resolve => {
    const win = window.open(url, '_blank');
    t.add_cleanup(() => win.close());
    window.onmessage = e => {
      assert_equals(e.data, 'LOADED');
      resolve(win);
    };
  });
}

// Runs a series of tests related to service worker interception for a worklet.
//
// Usage:
// runServiceWorkerInterceptionTests("paint");
function runServiceWorkerInterceptionTests(worklet_type) {
  const worklet = get_worklet(worklet_type);

  // Tests that a worklet should be served by the owner document's service
  // worker.
  //
  // [Current document] registers a service worker for Window's URL.
  // --(open)--> [Window] should be controlled by the service worker.
  //   --(addModule)--> [Worklet] should be served by the service worker.
  promise_test(async t => {
    const kWindowURL = 'resources/addmodule-window.html';
    const kServiceWorkerScriptURL = 'resources/service-worker.js';
    // This doesn't contain the 'resources/' prefix because this will be
    // imported from a html file under resources/.
    const kWorkletScriptURL = 'non-existent-worklet-script.js';

    const registration = await service_worker_unregister_and_register(
        t, kServiceWorkerScriptURL, kWindowURL);
    t.add_cleanup(() => registration.unregister());
    await wait_for_state(t, registration.installing, 'activated');

    const win = await openWindow(t, kWindowURL);
    assert_not_equals(win.navigator.serviceWorker.controller, null,
                      'The document should be controlled.');

    // The worklet script on kWorkletScriptURL doesn't exist but the service
    // worker serves it, so the addModule() should succeed.
    win.postMessage({ type: worklet_type, script_url: kWorkletScriptURL }, '*');
    const msgEvent = await new Promise(resolve => window.onmessage = resolve);
    assert_equals(msgEvent.data, 'RESOLVED');
  }, 'addModule() on a controlled document should be intercepted by a ' +
     'service worker.');

  // Tests that a worklet should not be served by a service worker other than
  // the owner document's service worker.
  //
  // [Current document] registers a service worker for Worklet's URL.
  // --(open)--> [Window] should not be controlled by the service worker.
  //   --(addModule)--> [Worklet] should not be served by the service worker.
  promise_test(async t => {
    const kWindowURL = 'resources/addmodule-window.html';
    const kServiceWorkerScriptURL = 'resources/service-worker.js';
    // This doesn't contain the 'resources/' prefix because this will be
    // imported from a html file under resources/.
    const kWorkletScriptURL = 'non-existent-worklet-script.js';

    const registration = await service_worker_unregister_and_register(
        t, kServiceWorkerScriptURL, 'resources/' + kWorkletScriptURL);
    t.add_cleanup(() => registration.unregister());
    await wait_for_state(t, registration.installing, 'activated');

    const win = await openWindow(t, kWindowURL);
    assert_equals(win.navigator.serviceWorker.controller, null,
                  'The document should not be controlled.');

    // The worklet script on kWorkletScriptURL doesn't exist and the service
    // worker doesn't serve it, so the addModule() should fail.
    win.postMessage({ type: worklet_type, script_url: kWorkletScriptURL }, '*');
    const msgEvent = await new Promise(resolve => window.onmessage = resolve);
    assert_equals(msgEvent.data, 'REJECTED');
  }, 'addModule() on a non-controlled document should not be intercepted by ' +
     'a service worker even if the script is under the service worker scope.');

  // Tests that static import should be served by the owner document's service
  // worker.
  //
  // [Current document] registers a service worker for Window's URL.
  // --(open)--> [Window] should be controlled by the service worker.
  //   --(addModule)--> [Worklet] should be served by the service worker.
  //     --(static import)--> [Script] should be served by the service worker.
  promise_test(async t => {
    const kWindowURL = 'resources/addmodule-window.html';
    const kServiceWorkerScriptURL = 'resources/service-worker.js';
    // This doesn't contain the 'resources/' prefix because this will be
    // imported from a html file under resources/.
    const kWorkletScriptURL = 'import-non-existent-worklet-script.js';

    const registration = await service_worker_unregister_and_register(
        t, kServiceWorkerScriptURL, kWindowURL);
    t.add_cleanup(() => registration.unregister());
    await wait_for_state(t, registration.installing, 'activated');

    const win = await openWindow(t, kWindowURL);
    assert_not_equals(win.navigator.serviceWorker.controller, null,
                      'The document should be controlled.');

    // A script statically imported by the worklet doesn't exist but the service
    // worker serves it, so the addModule() should succeed.
    win.postMessage({ type: worklet_type, script_url: kWorkletScriptURL }, '*');
    const msgEvent = await new Promise(resolve => window.onmessage = resolve);
    assert_equals(msgEvent.data, 'RESOLVED');
  }, 'Static import should be intercepted by a service worker.');
}